SOLUTION: Five brothers bought a gift for their mother’s birthday. The cost of the gift was 150 dollars. Moses gave 80 dollars, Daniel gave 21 dollars, Anthony gave 20 %, Lucas gave 18

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Question 1122977: Five brothers bought a gift for their mother’s birthday.
The cost of the gift was 150 dollars. Moses gave 80 dollars,
Daniel gave 21 dollars, Anthony gave 20 %, Lucas gave
18 dollars and Mark paid the rest. How much was Mark´s
contribution?

Answer by Edwin McCravy(20054) About Me  (Show Source):
You can put this solution on YOUR website!
Five brothers bought a gift for their mother’s birthday.
The cost of the gift was 150 dollars.
Moses gave 80 dollars,
So Moses' contribution = $80

Daniel gave 21 dollars,
So Daniel's contribution = $21

Anthony gave 20%,
Since 20% of $150 = (0.20)×($150) = $30, 
So Anthony's contribution was $30

Lucas gave 18 dollars
So Lucas' contribution was $18

and Mark paid the rest. How much was Mark´s contribution?
We add the contributions from Moses, Daniel, Anthony and Lucas:

 $80 Moses
  21 Daniel
  30 Anthony
 +18 Lucas
----
$149 Total contribution from other four besides Mark

Then we subtract

$150
-149
----
$  1 the amount Mark contributed, just one dollar!

Edwin